The recommended way to add apps into the Fiori Launchpad is by creating a Semantic Object.  The alternate method via a target URL is described in this document (Target URL Method). 

Configuration Steps

Create a new Semantic Object (Tcode /UI2/SEMOBJ)

• Login to SAP Gateway then go to transaction /UI2/SEMOBJ
• Click "New Entries" button to create a new Semantic Object
• Enter the following information
  • Semantic Object
  • Semantic Object Name
  • Semantic Object Description
    
    
    
    
  • Click "Save" – Create transport when asked.

Gateway - Create a new application in Customer Launchpad (Tcode LPD_CUST)

• Login to SAP Gateway, then go to transaction LPD_CUST
• If you haven't created a new Launchpad, create one by clicking "New Launchpad" and provide the details.
• Double click the new Launchpad entry and populate the following fields:

• Right-click on the Launchpad name folder and select "New application"
  
  
• Populate the following fields:
  • Link Text – e.g. CAPEXDEMO2
  • Application Type: URL
  • URL:
    • Click the "URL Editor" button
      
      
      
      
    • Then enter the FAB URL excluding the hostname and port e.g (/sap/bc/ui5_ui5/iqx/fab2)
    • Click the "URL Editor button" again to accept the changes

• Application Alias
  • Click the "Editor Application Alias" button
    
    
    
    
  • Enter an action string for the app e.g. SubmitCapex and click on "Editor Application Alias" to accept the changes
    
    
    
    

  • Additional Information: Enter "SAPUI5.Component=fab"

  • Click "Save"

Create a Tile Catalog in gateway via Fiori Designer

• Login to the Fiori Launchpad Designer via this link:
  
  <server host>:<port>/sap/bc/ui5_ui5/sap/arsrvc_upb_admn/main.html?sap-client=<client>&sap-language=EN

• Login using your SAP Gateway account 
  On successful login, you should be able to see the list of catalogs in the gateway
  
  
• Ensure that you are in the Catalog section by pressing "Catalogs" tab on the upper left-hand side:
  
  

• Create a new Tile Catalog by pressing the + button on the lower left-hand part of the screen:
  
  
  
  

• On the pop-up screen, select "Standard" and provide a Title and ID. The ID needs to start with Z* and press Save
  
  
  
  
• A new catalog will be created
  
  
  
  

• You have now created a Tile Catalog

Create a Tile in the Tile Catalog

• While the new catalog is selected on the right-hand side, click on the + sign to add a tile. A list of tile template will show:
  
  
  
  

• Click on the "App Launcher – Static" tile. You should then see the configuration screen for a tile
  
  
  
  

• Configure the following parameters:
  • Title: <Your app title>
  • Subtitle: <Your app subtitle>
  • Keywords: <some keywords for your app>
  • Icon: <Select from drop down or refer to Icon Explorer site>
  • Information: <Additional information for your app>
  • Use semantic object navigation: Ticked. By default, this field is ticked.
    • Semantic Object – search the created Semantic Object from the dropdown
      
      
      
      
    • Action: Enter the "Application Alias" from launchpad e.g. SubmitCapex
      
      
      
      
    • Parameters: Enter "FormName" as the parameter
    • Click the "Save" button at the bottom of the page:
      
      
      
      
  • Back to the tile catalog, click on the Target Mapping button at the top of the screen
    
    
    
    

  • If the "Target Mapping" tile is not clickable, this is a known issue with SAP UI5 Library. Refer to SAP Note 2409207 - Unable to open the Target Mappings icon in Fiori Launchpad Designer when using Google Chrome. 
    
    

    In summary, you may either upgrade to the UI5 library mentioned, or a quick workaround is to disable the "Touch Event API" in Chrome settings:
    
    In Chrome tab, go to chrome://flags/
    Search "Touch Events API", select Disable then click "Relaunch".
    Revisit the Fiori Launchpad Designer and see that the Target Mapping Tile is now clickable.
    
    

  • In the Target Mapping page, click on "Create Target Mapping" button at the bottom of the page
    
    
    
    

  • Populate the following fields in the Target Mapping Configuration:

    • Intent:
      • Semantic Object: Search and select the created Semantic Object
      • Action: Same as "Application Alias" from Launchpad
    • Target:
      • Application Type: SAP Fiori App using LPD_CUST
      • Launchpad Role: Search and select the Launchpad
      • Launchpad Instance: (automatically defaulted from Launchpad)
      • Application Alias: Select the Application Alias from launchpad
        
        
        
    • General:
      • In the Parameters section, you also need to add the following parameter:
        • Name: FormName
        • Default Value: This should be the technical name of the FAB Application. (NOTE: Leaving this value blank will redirect the tile to the FAB Launchpad)
  • Click  "Save"
  • You have now created a tile in Fiori Launchpad

Create a SAP Role in Gateway and assign users

• Login to SAP Gateway system
• Go to transaction PFCG
• Create a new SAP Role for your Fiori Catalog e.g. ZIQX_FABFLP_ROLE, then click the Single Role button. The screen to maintain the new role will be displayed.
  
  
  
  

• Enter a description and click on the Menu tab. Save the role when asked. You should now see the Menu tab:
  
  

• Beside the button "Transaction", click the small button beside it to switch to "SAP Fiori Tile Catalog".
  
  
  
  

• A new pop up will show to identify which catalog to assign.
  
  
  
  

• In the Catalog Provider, select Fiori Launchpad Catalogs.
• From the dropdown, select the new Catalog created from Fiori Launchpad.
  
  
  
  

• Click check to continue. The catalog will now be assigned to the role.
  
  

• Go to "Users" tab and enter the users who will be assigned with this new role.
  
  

• Click Save.

As a user, add the new tile into own Fiori Launchpad

• Login to Fiori Launchpad as one of the users assigned with the new role
• When in the Fiori Launchpad, click on the username on the upper right-hand side of the screen and select "Tile Catalog"
  
  
  
  

• Locate the new tile from the list of assigned tiles.
  
  
  
  

• Click the + button to add the tile into your Fiori Launchpad and select which group it will initially belong to.
  
  
  
  

• Click Ok and click the Home button to go back to Fiori Launchpad.
• The tile should now be available and can open the new FAB App.